ALMA observations of the environments of G301.1364-00.2249A

Zh. Assembay, Toktarkhan Komesh, Guido Garay, A. Omar, Jarken Esimbek, Н.Ш. Алимгазинова, М.Т. Кызгарина, Sh. Murat

2022

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DOI 10.1017/s1743921323002624
Data confidence 70 medium
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Abstract

Abstract Context: Theoretical scenarios describe the phenomenon of mass accumulation by high-mass young stellar objects (HMYSOs) through disk accretion. Aims: To find out whether the rotation of the core around hyper-compact (HC) HII regions is common Methods: The molecular core G301.1364-00.2249A was selected as the subject of investigation. Observations were carried out on CH3CN, SO2, H29α radio recombination line and continuum emission. Analysis involved the “Moment 0, 1, 2" and “Population-diagram” methods. Result: The structures of G301.1364-00.2249A exhibited clear definition. CH3CN moment 0 images revealed multiple enhanced emission regions and an absorption area. The moment 1 image depicted a velocity gradient from southeast to northwest. Conclusion: The molecular gas has a rotational motion in the direction from the southeast to northwest. The rotational temperature was measured at 293 K.